254 THE CANADIAN NATURALIST. [Vol. X. 



detail and illustrated by drawings and photographs, including 

 microscopic delineations of the teeth of all the species, with their 

 internal structure and the microscopic structure of their bones, 

 as well as representations of their cuticular ornamentation and 

 armour. 



The Labjrinthodonts are represented by only two species of 

 Dendrerpefon, which are also described and delineated. 



About half of the reptilian species described are new, and 

 those previously described from fragmentary remains are now 

 more fully characterised, and their parts more minutely ex- 

 amined. 



The invertebrate animals found are three species of land snails 

 and five of niyriapods, besides specimens supposed to represent 

 new species of myrinpods and insect larvae, not yet fully examined, 

 and which have been placed in the hands of Dr. Scudder, of 

 Cambridge, U. S. 



The memoir, consisting in great part of condensed descriptions 

 of the facts observed, does not admit of much abridgement, and 

 cannot be rendered fully intelligible without the accompanying 

 plans, sections and drawings. It closes with the following 

 general statement: — 



" The negative result that, under the exceptionally favourable 

 conditions presented by these erect trees, no remains of any 

 animals of higher rank than the Microsauria^ and Labyr'mtlio- 

 dontia have been found deserves notice here. It seems to indi- 

 cate that no small animals of higher grade inhabited the forests 

 of Nova Scotia at the period in question ; but this would not 

 exclude the possibility of the existence of higher animals of a 

 larger size than the hollow trees were capable of receiving. Nor 

 does it exclude the po^^.^ibility of higher animals having lived 

 contemporaneously in upland situations remote from the low 

 flats to which our knowledge of the coal formation is for the 

 most part confined. It is to be observed also that as some of 

 the reptilian animals are represented only by single specimens, 

 there may have been still rarer forms, which may be disclosed 

 should other productive trees be exposed by the gradual wasting 

 of the cliff and reef." — Nature. 



